The role of insect produced attractants on the aggregation behaviour of the rnediterranean pine engraver beetle Orthotornicus erosusDurin field e eriments, Orthotomicus erosus was caught mostly in traps baited with a combination o!t he beeye roduced compounds 2-meth~l-3-buten-2-01 and ipsdlenol. When offered alon with 2-methyl-3-futen-2-01, an u to 1000-fol increase in concentration of racemic ipsdienol le to a continual increase in catch o?O. erosus and Ips sexdentatus, accompanied by a steady increase of P P-%. It is assumed that 2-methyl-3-buten-2-01 influences landing behaviour of 0. erosus, while ipsdienol acts as a long distance signal. With 0. erosus, ipsdienol could not be replaced by nonspecific pheromonal components (S)-cis-verbenol or racemic frontalin. When offered along with the beetle produced binary mixture, however, especially racemic frontalin had an additive kairomonal effect. i 1 Einleitung Der mediterrane Kiefernborkenkafer Orthotomicus e m u s (Woll.) gewinnt in den kunstlichen Anbaugebieten raschwiichsiger Pinus-Arten zunehmend wirtschaftliche Bedeutung. Als typisches Folgeinsekt wird er oft nach Durchforstun seingriffen oder klimatisch bedingter Schwachung in ungeren Bestanden RAS et HAMZA MENDEL EL 1983; BEVAN 1984; MENDEL et al. 1985). Als Aggregationssi nale von 0. erosus wurden das mannchenspezifische Ipsdienol sowie 2-Meth -3-buten-2-01 nachgewiesen; im Freilandversuch brachte die Kombination i eider Komponenten die hochsten Fangzahlen ( GIESEN et al. 1984; FRANCKE et al. 1986). Fur den Einsatz solcher verhaltenssteuernder Chemikalien im Rahmen eines Pest-Management-Systems wurde die Effektivitat verschiedener Lockstoffgemische vergleichend getestet. ' Mit Unterstiitzung der Stiftung Volkswagenwerk. U.S.

Can. Ent. 124: 341-346 (1992) The fecundity of first-generation adult Pholetesor ornigis (Weed) increased when individuals were confined with flowers of creeping "Charlie" (Glechoma hederacea L.), dandelion (Tarmacum oficinale Weber). and apple (Malus domesricus L.), but not with blossoms of chickweed [Stellaria media (L.) Cyril101 or Shepherd's purse [Capsella bursa-pastoris &.) Medic]. Longevity of P. ornigis was little affected. The fecundity of second-generation P. ornigis increased when individuds were confined with terminal leaves of apple with honeydew of the aphid Aphispomi DeGeer, but not when confined with terminal leaves without honeydew or with flowers of round-leaved mallow (Malva neglecta Wallr.) or red clover (Trifolium prateare L.). Longevity of P. ornigis adults also increased when they were provided with aphid honeydew. There were significant differences between the total number (oviwsited and ovarian) of engs produced by second-generation females given different f o d sources. Those given a&; d honeydew oviposited a greater proportion of their eggs than those confined with apple leaves without honeydew or with flowers of M. neglects or T, pratense. Adult P. orniRis fed ,an aqueous solution of honey (5050, vfv) lived longest and produced more eggs than those provided with any other food source. Hagley, E.A.C., et D.R. Barber. 1992. Effet de divers types de noumture sur la longkvit6 et la fkconditk de Pholetesor ornigis (Weed) (Hymenoptera: Braconidae). Can. Ent. 124: 341-346. La feconditk des adultes de la premikre gentration de Pholetesor omigis (Weed) augmente chez les individus enfermCs avec des fleurs du glCcome lierre (Glechoma hederacea L.), du pissenlit (Taraxacum officinale Weber), ou du pornmier (Malus domest i c~ L.), mais pas chez les individus enfemes avec des fleurs de la stellaire moyenne [Sfelloria media (L.) Cyrillo] ou de la capselle bourse B pasteur [Capsella bursapasroris (L.) Medic]. La IongCvitC de I'espike est peu affect& par la nature de la plante.La fkonditk des adultes de seconde generation de P. orni~is augmenle chez les individus enferm6s avec des feuilles terminales de pornmiers garnies de miellat du puceron Aphis pomi DeGeer, mais pay chez les individus enfermCs avec des feuiles terminales sans miellat ou avec des flem de la mauve ntgligke (Malva neglect0 Walk.) ou du mHe des champs (Trifolium pratense L.). La Wsence de miellat augmente @dement la IongtvitC de P. ornigis. II y a des diffewnces significatives entre le nombre total d'oeufs (pondus ou encore dans I'ovaire) produits par la seconde gCn6ration de fernelles, selon la nature de la noumture qu'elles reqoivent. Les fernelles nourries de miellat pondent une plus grande proportion de leurs oeufs que les femelles enfermks avec des feuilles de pommiers sans miellat ou avec des fleurs de M. neglecta ou de T. pratense.Les adultes de P. ornigis nourris d'une solution aqueuse de miel (5050, vlv) vivent plus longtemps et produisent plus d'oeufs que les femelles soumises ? I tout autre kgime alimentaire .[Traduit par...

Can. Enr. 114: 431-437 (1982) Laboratory studies of the food preferences of several adult carabids showed that Amara aenea DeG., Anisodactylus sanctaecrucis F., Harpalus affinis Schr., and Stenolophus comma F. were polyphagous and readily fed on the seeds of several weeds as well as on young codling moth larvae and apple maggot pupae. H. affinis also attacked 4th and 5th instar codling moth larvae and pupae more readily than the other species. Pterostichus melanarius 111. showed a strong preference for the larger prey such as 5th instar codling moth larvae, earthworms, and scarabaeid larvae. The potential of these species as predators of the codling moth and the apple maggot is discussed. Des Ctudes de laboratoire sur les prkfkrences alimentaires de plusieurs carabidks adultes ont rCvClC que Amara aenea DeG., Anisodactylus sanctaecrucis F., Harpalus affinis Schr. et Stenolophus comma F. Ctaient polyphages et n'hksitaient pas 5 se noumr des graines de plusieurs especes de mauvaises herbes, ainsi que de jeunes larves du carpocapse et de pupes de la mouche de la pomme. H . affinis s'attaque Cgalement davantage aux pupes et aux larves des 4e et 5e stades du carpocapse qu'aux autres espkces. Pterostichus rnelanarius Ill. montre une prefkrence marqude pour les proies plus volumineuses comme les larves du 5e stade du carpocapse, les lombrics et Ies larves de scarabCidCs. L'auteur Ctudie I'efficacitC prtdatrice de ces esptces sur le carpocapse et la mouche de la pomme.

Populations of the spotted tentiform leafminer, Phyllonorycter blancardella (Fabr.), from sprayed orchards across southern Ontario were found highly resistant (about 160-fold at LC50) to azinphosmethyl. Cross resistance to phosmet and partial cross resistance to diazinon were also indicated. All populations were highly susceptible to several synthetic pyrethroid insecticides. Resistant populations were controlled with pyrethroid insecticides applied when eggs were first found or by methomyl applied at about 50% hatch.

Can. Ent. 110: 1127Ent. 110: -1 132 (1978 Acephate (Orthene 75s) was applied to Douglas-fir (Pseudotsuga menziesii Mirbl. [Franco]) in spring 1976 to determine its efficacy for protecting current year's foliage from western spruce budworm (Choristoneura occidentalis Freeman). Results showed budworm mortality for both treatments exceeded the checks by at least 91% at all sample periods. A significant degree of foliage protection was also achieved as measured by mean twig length and mean number of missing needles per twig. Samples of new growth were analyzed for residues of acephate and methamidophos (an active metabolite of acephate) by gas-liquid chromatography. Results showed that high levels of insecticide persisted for about 10 days, then dropped over a 5-day period to lower levels for the rest of the study, about 35 days.